Tennessee Urgent Care Please Help...Due Today!! Urgent!!!?

Please Help...Due today!! Urgent!!!? - tennessee urgent care

An article in the ASCE Journal of Energy Engineering publication contains data on the concentration of dissolved oxygen flow of less than 20 dams in the system by Tennessee Valley Authority. The sample mean of the observation is
x-bar = 3.217 and the standard deviation s = 2.128.
Water Engineers are in support requests, whether these data mean interested dissolved oxygen concentration is 2.5 milligrams per liter.

(a) Determine the test statistic for testing the hypothesis that the average concentration of dissolved oxygen at 2.5 milligrams per liter.

(b) there are indications that the average concentration of 2.5 milligrams per liter of dissolved oxygen is it? Use alpha = 0.05